I don’t think we are saying the same thing. My point is that, 4.0 GPA or not, if you don’t take the SAT/ACT you will be at a disadvantage when applying to elit

I don’t think we are saying the same thing. My point is that, 4.0 GPA or not, if you don’t take the SAT/ACT you will be at a disadvantage when applying to elite, private universities. For the very simple reason that there’ll be many others with similar background as you, with the exact same GPA _and_ SAT/ACT scores. You’ll be more of a wildcard to admissions due to lack of information. If you want to have a chance to get into Harvard/MIT/Stanford/etc you have to take the SAT/ACT. Period.